Oops! If you are seeing an error message saying that you can’t sign in with the email you provided, it is probably because the email address you used isn’t associated with a Minecraft: Education Edition license.
If you are seeing this message, you are either trying to sign into Minecraft: Education Edition with a personal account (i.e. Gmail, Yahoo, or iCloud) or with an account that was not assigned a license. Contact your IT administrator to verify which email you should use.